11 Troubleshooting
11.1 Troubleshooting procedure
As a matter of principle, the instructions in the project planning and commis-
sioning manuals must be followed in case of failures and errors. Contact the
manufacturer, if necessary.
Malfunctions Error cause Measures
Motor does not run Controller enable signal missing Activate controller enable signal
Controller fault Troubleshoot acc. to documentation
of controller
Voltage supply missing Control voltage supply
Brake is not released Check the brake activation
Vibrations Coupling elements or attachments are
poorly balanced
Re-balance
Adjustment of shaft end attachments
(coupling, gearbox, ...) is insufficient
Re-align the attachments
Mounting screws loose Lock screw connections acc. to spec-
ifications
Running noise Foreign bodies within the motor Stop the motor --> repair by manu-
facturer
Bearing is damaged Stop the motor --> repair by manu-
facturer
High motor temperatures
Motor temperature monitoring is ac-
tivated
Operation outside of rated data Reduce load and check the dimen-
sioning
Heat dissipation is impaired Clean the motor
Clean the grille of the fan unit and
check the function of the fan
Check the coolant circuit of liquid
cooling systems
Wrong or defective temperature dis-
play
Temperature sensor not connected Connect temperature sensor
Temperature sensor defective Stop the motor --> repair by manu-
facturer
Change the temperature sensor.
Connect the backup temperature
sensor, if any is available.
Tab. 11-1: Measure at malfunction
MS2N Synchronous Motors
Bosch Rexroth AG
Troubleshooting
DOK-MOTOR*-MS2N*******-IT03-EN-P
87/95
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